Chip cutter blade



Dec. 5, 1961 B. w. ANDRUS EFAL 3,011,535

CHIP CUTTER BLADE Filed June 20, 1960 2 Sheets-Sheet 1 INVENTORS .Bm M fin/oeus fl/snqr- 14.140; 15,720,

Dec. 5., 1961 B. w. ANDRUS EIAL 3,011,535

CHIP CUTTER BLADE Filed June 20, 1960 2 Sheets-Sheet 2 INVENTORS fas/wl dw United States Patent 0.

Filed June 20, 1960, Ser. No. 37,381 4 Claims. (Cl. 144-219) This invention relates to a chip cutting blade and comprises a continuation-in-part of our co-pending application Serial No. 774,747, filed November 18, 1958, and now Patent No. 2,966,182, entitled Lumber Blanking and Chipping Machine.

A primary object of this invention is the provision of an improved chipping blade which is particularly adapted for use in a machine to size lumber by removing chips instead of shavings so that the chips can be used in the making of paper pulp and the saving of valuable pulp material is accomplished.

An additional object of the invention is the provision of a blade of this character, which when employed in a blanking and chipping machine such as is described in our co-pending application above mentioned, will chip relatively large chips consisting of relatively long fibers which are usable in the making of wood or paper pulp from a piece of lumber to be blanked or sized.

An additional object of the invention is the provision of such a chipping blade which is durable in construction, reliable and efficient in its operation of producing chips with long fibers, and relatively simple and inexpensive to manufacture.

Still other objects will in part be obvious and in part be pointed out as the description of the invention proceeds and shown in the accompanying drawings wherein there are disclosed preferred embodiments of this inventive concept.

In the drawings:

FIGURE 1 is a plan view of a cutter disk incorporating elements of the instant invention.

FIGURE 2 is a side elevational view of the blade shown in FIG. 1.

FIGURE 3 is an enlarged fragmentary plan view of one of the chip cutting blades and the mounting therefor.

FIGURE 4 is a fragmentary sectional view taken substantially along the line 44 of FIG. 3 as viewed in the direction indicated by the arrows.

FIGURE 5 is an enlarged fragmentary sectional View taken substantially along the line 55 of FIG. 3 as vie-wed in the direction indicated by the arrows.

FIGURE 6 is a perspective view of one form of chipping blade removed from the rotor.

FIGURE 7 is a view similar to FIG. 1 showing a modified form of disk and chipping blade.

FIGURE 8 is an enlarged sectional view taken substantially along the line 8-8 of FIG. 7 as viewed in the direction indicated by the arrows.

FIGURE 9 is an enlarged perspective view of the modified form of chipper blade as shown in FIGS. 7 and 8, removed from its associated rotor, and

FIGURE 10 is a perspective view of one of the chips removed by the cutter blade of the instant invention from a piece of lumber.

Similar reference characters refer to similar parts throughout the several views of the drawing.

Having reference now to the drawings in detail, and more particularly to FIGS. 1 and 2, there is generally indicated at a rotor disk which is mounted on a shaft 21 driven from any suitable source of power, as described in our above-mentioned co-pending application, and juxtaposed to a piece of lumber 22 to be blanked. The rotor disk 20 is cut away along a series of lines 23 to provide cutter blade holding recesses or notches 25, por- 3,011,535 Patented Dec. 5, 1961 ice j .tions of the cut-away piece being bent downwardly at an incline as indicated at 26to form cutter blade holders. Cutter or chipping blades generally indictaed at 27 are secured to the portions 26 as by means of bolts 28. In this form 'of the invention each cutter blade 27 is, as best shown in FIG. 6, comprised of a body portion 29 provided with an angularly offset portion 30 extending on one sidethereof. A portion to the rear of body 29 is cut away as at 31, and a corresponding end portion of the offset portion 30 is cut away at 32, bolt holes 33 and 34 being provided in the respective cut-away portions for the accommodation of the bolts 28. The front edge of both portions 29 and 30 is beveled as at 35 and 36, respectively, to form a cutting or chipping blade portion which engages the wood to be sized. The offset blade portion 36 serves to direct the chips 37 upwardly and outwardly as best shown in FIGS. 3 and 4.

FIGS. 7, 8, and 9 show a modified form of construction wherein a disk 40 similar to the disk 20 is mounted on a shaft 41 and similarly driven to act on a piece of wood 42. In this modification cut-away portions or notches 41' are formed by cutting along line 41", chipping blade holders 43 being provided instead of the downwardly turned portions 26. Holders 43 include flat plate 7 portions 44 which are secured as by bolts 45a to the underside of plate 40 adjacent each cut-away portion 41. Integrally formed with the plates 44 are downwardly inclined offset portions 45 having beveled lower edges 46 which extend in parallelism to the under surface of the plate 40, and to which are secured cutter blades generally indicated at 47. Each cutter blade 47 as best shown in FIG. 9, comprises a body portion 48, having an angularly offset portion 49 extending along one side thereof, the offset portion projecting upwardly toward the blade 40, the forward edge of portion 48 is beveled as at 50 to form a sharp cutting edge 51, and the forward edge of offset portion 49 is correspondingly beveled as at 50a to form a similar cutting edge 52. Elongated adjustment openings 53 in the portions 48 receive bolts 55 which engage in suitable apertures in the offset portions 45 for securing the chipping or cutter blades to the holder.

By employing a blade of this type, a relatively large chip 37 having relatively long fibers is produced.

From the foregoing it will now be seen that there is herein provided an improved chipping blade or disk for chipping lumber adapted to be employed with a blanking and chipping machine, and particularly with a machine described in our co-pending application above mentioned which accomplishes all of the objects of this invention, and others including many advantages of great practical utility.

' As many embodiments may be made in this inventive concept, and as many modifications may be made in the embodiments hereinbefore shown and described, it is to be understood that all matter herein is to be interpreted I merely as illustrative and not in a limiting sense.

We claim:

1. A chipper disk for a lumber blanking and chipping machine comprising a generally circular fiat plate, a plurality of downwardly offset blade holding extensions formed on the peripheral edge portion of said plate,

said peripheral edge portion being cut away to provide notches for the accommodation of said extensions, and a blade releasably secured to each extension, said blades extending substantially parallel to said disk, each of said blades comprising a generally flat horizontal portion and an upwardly angularly offset portion formed with said blade along one side thereof.

2. The structure of claim 1 wherein each horizontal portion and each offset portion are beveled upwardly towards said plate to form a cutting edge.

3. The structure of claim 1 wherein each horizontal portion and each 'angularly upwardly oifset portion are beveled downwardly to form a cutting edge.

4. A chipper disk for a lumber blanking and chipping machine comprising a generally circular fiat plate, a 5 plurality of downwardly ofiTset extensions integrally formed on the peripheral edge portion of said plate, and a blade releasably secured to each integral extension with each blade extending substantially parallel to said disk, each of said blades comprising a generally flat horizontal 10 portion and an angularly upwardly offset portion integral- 1y formed with said blade along one side thereof.

References Cited in the file of this patent UNITED STATES PATENTS FOREIGN PATENTS Germany Oct. 24, 1889 Denmark Feb. 10, 1918 

